A Cyclic Universe: A New Model to Rival the Big Bang Theory Phys 1070- Astronomy Topical Essay Motivated by the M-theory‚ space-time ‘branes’ and extra-dimensions‚ scientists Paul J. Steinhardt and Neil Turok introduce a tantalizing alternative to the prevailing standard Big Bang-Inflation model of cosmology. Traditionally‚ the Big Bang-Inflation model features an explosive epoch 15 billion years ago when time and space sprung into existence followed by a fraction of a second of superluminal expansion
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What Makes A Ride Thrilling? Year 11 Physics ERT Introduction Theme parks have always been a source of thrills and amusement‚ as well as major source of tourist revenue. As celebrated coaster designer John Allen states: “You don’t need a degree in engineering to design roller coasters‚ you need a degree in psychology” (Focus‚ 2009) For decades‚ thrill rides have implemented psychological thrills such as long upward climbs building anticipation‚ surprise twists and turns‚ and hills that
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Some Evidence for an Infinite Universe Observations from the WMAP satellite show with a 0.5% margin of error that the universe has a flat geometry‚ which suggests that its size is unbounded.[i] Director of the Institute for Cosmology at Tufts University‚ Alexander Vilenkin says‚ “The theory of inflation is by far the best explanation we have for the big bang. If we accept this theory‚ and refuse to mutilate it by adding any ad hoc‚ unnecessary features‚ then we have no choice but to accept
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Dark energy is a mysterious and poorly understood force‚ but scientists are doing their best to prove that dark energy does exists. Scientists have proposed that dark energy is somehow causing the universe to expand at an accelerating rate; due to this conclusion‚ they think that dark energy’s existence is 99.996% real. Dark energy was not discovered a few days ago but in the 1990s when two groups of scientists proposed its. When the groups were observing supernovas‚ some of the stars were less bright
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The Big Idea Over 2500 years ago Aristotle proposed two laws of physics governing motion. One for ‘Earthly bodies’ (objects on Earth) that states objects naturally go in straight lines and one for ‘Heavenly bodies’ (objects in space) that states objects naturally go in circles. This idea held steady for 2‚000 years‚ until Isaac Newton in a triumph of brilliance declared that there is one law of physics that governs motion and he unified “earthly” bodies and “heavenly” bodies with the The Universal
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Question 1 | 1.61 points | Save | | You are standing on a scale in an elevator. Suddenly you notice your weight decreases. What do you conclude? | | | | | | | | The elevator is accelerating downwards. | | | The elevator is moving at a constant velocity downwards. | | | The elevator is moving at a constant velocity upwards. | | | Your diet is working. | | | The elevator is accelerating upwards. | | | | | | Question 2 | 1.61 points | Save | | Tidal
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Most people are familiar with the idea of wormholes in space. Try to imagine the universe as a balloon. When you pick two spots on the balloon and push toward the center‚ you can make those two points meet with no space between them. To imply that idea was true for the universe would mean that two points far from each other could be traversed in one step. The normal immense distance between the earth and the moon‚ or even another galaxy could be skipped by taking a shortcut. Now imagine time as a
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MANUEL FIGUEROA 2/14/13 WHY IS THE TOPIC IMPORTANT TO THE SOCIETY: Gravity and friction are two forces that work together to allow life as we know it on earth. They are balanced forces. There is no movement without first overcoming friction‚ which is why a heavier object falls faster due to gravity than a lighter object. A heavy object is not resisted by air friction‚ while a very light object is (which causes
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(Insert name here) ENGPHY1 EK Report 1. When I rode the dodgem‚ I noticed that whenever my friends bumped against my vehicle‚ the direction of the force I was experiencing was towards the direction where they were headed to. After thinking about it‚ it came to me that this was because of Newton’s second law stating that an object experiencing an outside force will move in the direction due to that force. 2. While riding the Wheel of Fate while it was moving‚ I our cart experienced a greater
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Civilizations 12 How in your view was the world created ? In regards to the creation of the world‚ I believe that modern scientific explanations are more realistic than the theories of creationism. Science holds a definite‚ factual theory‚ while creationists believe that the Book of Genesis explains how the universe was created and that it is the infallible word of God. While I can’t disprove that some greater being created the earth‚ I find that scientific theories‚ like the Big Bang
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